body {
    width:100%;
    height:100%;
    background-color: #000;
    background-image: url("../img/login-bg.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}
.container {
    width:400px;
    height:500px;
    background: rgba(255,255,255,0.7);
    box-shadow: 1px 1px 1px rgba(0,0,0,0.3);
    position: relative;
}